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为探讨美蓝染色对胃部病变的良恶定性和判定癌浸润深度的价值，将０．０３％美蓝用喷雾管经内镜直接在病变处喷洒染色。共４８个病灶，其中Ⅰ型２个，Ⅱａ９个，Ⅱａ＋Ⅱｃ６个，Ⅱｃ２３个，Ⅲ型２个，Ⅱｃ＋Ⅲ６个；粘膜内癌２０个病灶，粘膜下癌２８个病灶。染色后粘膜内癌正确判定浸润深度为８５．０％，粘膜下癌为８２．１％。结果提示低浓度美蓝对比法染色能使病变更加清晰，增加立体感，补充肉眼观察的不足，对鉴别良恶性和判定癌浸润深度有重要的价值。
To investigate the value of methylene blue staining for benign and qualitative gastric lesions and the value of determining the depth of cancer invasion, a 0.03% methylene blue spray tube was sprayed and stained directly through the endoscope. A total of 48 lesions, including type I 2, IIa 9, IIa+IIc6, IIc23, III type II, IIc+III6; mucosal intratumoral cancer 20 lesions, submucosal cancer 28 lesions. After staining, it was correctly determined that the infiltration depth was 85.0% in the intramucosal cancer and 82.1% in the submucosal cancer. The results suggest that the low concentration of methylene blue staining can make the lesion more clear, increase the three-dimensional sense, and supplement the deficiency of macroscopic observation, which is of great value in distinguishing between benign and malignant tumors and judging the depth of cancer invasion.